fix Memory leak in Unloader

Author: way-zer

patches/picked/0003-FIX-early-release-Ankuen-10066.patch

@@ -0,0 +1,46 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: way-zer <[email protected]>
+Date: Sun, 28 Jul 2024 23:52:46 +0800
+Subject: [PATCH] FIX early release #Ankuen:10066
+
+---
+ core/src/mindustry/world/blocks/storage/Unloader.java | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/core/src/mindustry/world/blocks/storage/Unloader.java b/core/src/mindustry/world/blocks/storage/Unloader.java
+index a7076762221515ba44b5ca78e7e9a1e37740e0c0..cb5a9f3a516f89589436c03395c67f1c0265c6ea 100644
+--- a/core/src/mindustry/world/blocks/storage/Unloader.java
++++ b/core/src/mindustry/world/blocks/storage/Unloader.java
+@@ -7,6 +7,7 @@ import arc.struct.*;
+ import arc.util.*;
+ import arc.util.io.*;
+ import arc.util.pooling.*;
++import arc.util.pooling.Pool.*;
+ import mindustry.annotations.Annotations.*;
+ import mindustry.entities.units.*;
+ import mindustry.gen.*;
+@@ -58,17 +59,22 @@ public class Unloader extends Block{
+         removeBar("items");
+     }
+ 
+-    public static class ContainerStat{
++    public static class ContainerStat implements Poolable{
+         Building building;
+         float loadFactor;
+         boolean canLoad;
+         boolean canUnload;
+         int lastUsed;
+ 
++        @Override
++        public void reset(){
++            building = null;
++        }
++
+         @Override
+         public String toString(){
+             return "ContainerStat{" +
+-            "building=" + building.block + "#" + building.id +
++            "building=" + (building != null ? (building.block + "#" + building.id) : "null") +
+             ", loadFactor=" + loadFactor +
+             ", canLoad=" + canLoad +
+             ", canUnload=" + canUnload +